Welcome to the AC Tropical Fish aquarium forum. Our aquarium forum is the place to discuss any aquarium related issue in a friendly environment. Our aquarium forum welcomes aquarists of all levels from beginners to experts. Please ask a question in the how to section of our forum or read the FAQ section if you have any questions. register to and become a part of our friendly aquarium forum community today.

Hello,
Will it work well if I use API ph test solution in a drop checker with 4dkh? Does anyone know if the API ph test is Bromothymol Blue? I already have some but the ingredients are not listed and can't find any answers online regarding if it will work well in a drop checker. Wondering if I should get some Bromothymol Blue or if the API solution works or if it is Bromothymol Blue?